Implement array/object destructuring (#3305)

This patch implements the core functionality of destructuring patterns.
Function argument/for in-of pattern are currently unsupported.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

jerry-core/parser/js/js-parser-module.c

@@ -76,6 +76,34 @@ parser_module_check_duplicate_import (parser_context_t *context_p, /**< parser c
   return false;
 } /* parser_module_check_duplicate_import */
 
+/**
+ * Append an identifier to the exported bindings.
+ */
+void
+parser_module_append_export_name (parser_context_t *context_p) /**< parser context */
+{
+  if (!(context_p->status_flags & PARSER_MODULE_STORE_IDENT))
+  {
+    return;
+  }
+
+  context_p->module_identifier_lit_p = context_p->lit_object.literal_p;
+
+  ecma_string_t *name_p = ecma_new_ecma_string_from_utf8 (context_p->lit_object.literal_p->u.char_p,
+                                                          context_p->lit_object.literal_p->prop.length);
+
+  if (parser_module_check_duplicate_export (context_p, name_p))
+  {
+    ecma_deref_ecma_string (name_p);
+    parser_raise_error (context_p, PARSER_ERR_DUPLICATED_EXPORT_IDENTIFIER);
+  }
+
+  parser_module_add_names_to_node (context_p,
+                                   name_p,
+                                   name_p);
+  ecma_deref_ecma_string (name_p);
+} /* parser_module_append_export_name */
+
 /**
  * Check for duplicated exported bindings.
  * @return - true - if the exported name is a duplicate